The Census Transportation Planning Package (CTPP) is a cooperative effort sponsored by the State Departments of Transportation and the Federal Highway Administration under a pooled funding arrangement with the American Association of State Highway and Transportation Officials (AASHTO). It provides a wide variety of transportation data for state and local areas.The CTPP 1990 is a collection of summary tables generated from the 1990 census short- and long-form, that contain information about population, household characteristics, worker characteristics, and characteristics of the Journey-to-Work (JTW). The CTPP is organized into the following two elements: State and Urban. The State Element of the CTPP consists of data summaries for all places of 2,500 or more population, the balance of the county, the county as a whole, and the entire state. The Urban Element of CTPP consists of data summaries for urbanized areas with a population of 50,000 or more. It should be noted that the CTPP does not contain raw census information, rather the information provided, as with all other census products, has been organized into a series of tables. The CTPP 2000 data will be released in 2003.

Coverage

CTPP provides state and local data for the 50 States and the District of Columbia.

The CTPP State Part A: By place of residence provides summary tables that describe persons, household and workers characteristics by place of residence. The tables are available for a place (area with population 2500 or more), county or state.

CTPP State Part B: Place of Work

The CTPP, State Part B: By place of work summarizes information about workers such as industry, sex, age, occupational class and time of arrival at work by place of work. The tables are available for a place (area with population 2500 or more), county or state.

CTPP State Part C: Journey-to-Work (JTW)

The CTPP State Part C: Journey-to-Work (JTW) provides detailed information about the commute trip from home to work, allowing the user to obtain such information as the origin and destination of each commuting trip, the travel time of the trip, when the trip began or ended including persons per vehicle and travel mode. The tables are available for a place (area with population 2500 or more), county or state.

CTPP Urban Part I: Place of Residence

The CTPP Urban Part I: By place of residence provides summary tables that describe persons, household and workers characteristics by place of residence. The tables are available for individual TAZs, as well as for Urbanized areas defined by the census bureau, and a total for the entire Metropolitan Statistical Area.

CTPP Urban Part II: Place of Work

The CTPP, Urban Part II: By place of work summarizes information about workers such as industry, sex, age, occupational class and time of arrival at work by place of work. The tables are available for individual TAZs, as well as for Urbanized areas defined by the census bureau, and a total for the entire Metropolitan Statistical Area.

CTPP Urban Part III: Journey-to-Work (JTW)

The CTPP Urban Part III: Journey-to-Work (JTW) provides detailed information about the commute trip from home to work, allowing the user to obtain such information as the origin and destination of each commuting trip, the travel time of the trip, when the trip began or ended including persons per vehicle and travel mode. The tables are available for individual TAZs, as well as for Urbanized areas defined by the census bureau, and a total for the entire Metropolitan Statistical Area.

State Geographic Data

The CTPP State Geographic data provides spatial information in form of Arc View Shape files (.shp, .shx, and .dbf file extensions) for all 50 states and the District of Columbia. The geographic data is available for County (County Code of Residence), MCD (County subdivision code), PMSA (Primary Metropolitan Statistical Area), MSA/CMSA (Metropolitan Statistical Area/Consolidated Metropolitan Statistical Area), and State.

Urban Geographic Data

The CTPP Urban Geographic data provides spatial information in form of Arc View Shape files (.shp, .shx, and .dbf file extensions) for all 303 regions. The geographic data is available for CBD (Central Business District), MSA (Metropolitan Statistical Area), PMSA (Primary Metropolitan Statistical Area), TAZ (Traffic Analysis Zone) and at the Region level. It should however be noted that geographic data for some regions may not have one or more geographic level data (For Example, TAZ) based on the type of geographic classification of the region.

Communal housing, such as dormitories, military bases, prisons and nursing homes. Group quarters are distinct from households.

Journey-to-Work (JTW)

The one-way trip from home to work, or a commuter trip.

Metropolitan Statistical Area

An MSA is a county or group of contiguous counties that contains at least one city with a population of 50,000 or more or a Census Bureau-defined urbanized area of at least 50,000 with a metropolitan population of at least 100,000. In addition to the county or counties that contain all or part of the main city or urbanized area, an MSA may contain other counties that are metropolitan in character and are economically and socially integrated with the main city.

Defined by the Census Bureau as having a population of 2,500 or more. Cities, towns, and villages are all places.

Place of Residence

The location at which Census respondents said they lived at the time the Census was taken. Household and economic characteristics are summarized by residence location.

Place of Work

The location at which Census respondents said they worked. Worker characteristics summarized by work place location.

Traffic Analysis Zone (TAZ)

Level of geographic detail used in most transportation planning applications to summarize socio-economic characteristics and travel data. TAZs vary in size depending on density and homogeneity of land uses, and are defined by local agencies.

Trip Chaining

A term used to refer to the phenomenon of making intermediate stops as part of a longer trip. For example, stopping at a convenience store or day care center as part of the trip from home to work. Chained trips were not reported in the 1990 Census data.